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Reversible Data Embedding Using a
Difference Expansion
Adviser:Pro.Yu-Chiang Li
Speaker: Yi-Lun Chen
DATE:2014/06/26
Author: Jun Tian
Data Source: IEEE Transactions on Circuits and
Systems for Video Technology, Vol.13, No.8, pp.890896, 2003.
南台科技大學
資訊工程系
Outline
2
1
Introduction
2
Background
3
Materials & Methods
4
Experiments and Result
5
Conclusion
Materials & Methods(2/12)
Difference Expansion(DE)嵌入資料
差值 ℎ轉成二進制
5(10) → 101(2)
將嵌入位元b放到h值的最低位元
ℎ′ = 1011(2) = 11(10)
得 ℎ′ = 2 × ℎ + 𝑏
3